# POSTECH ID vs PDF Grader PRO

The clearest difference is price: POSTECH ID at Free against PDF Grader PRO's $4.99. POSTECH ID also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.6). PDF Grader PRO's advantage is update cadence (every 3 days vs every 5 months). On in-app purchases and device support there is nothing between them.

POSTECH ID is free to download; PDF Grader PRO costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

POSTECH ID ships an update every 5 months, PDF Grader PRO every 3 days. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | POSTECH ID | PDF Grader PRO |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/postech-id/id1199401875/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 5 MB | 12 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pohang University of Science & Technology](https://appshunter.io/developer/1198977124) | [Hyeonchan Yu](https://appshunter.io/developer/1857516231) |

## What reviewers say

### POSTECH ID

[App page](https://appshunter.io/ios/app/postech-id/id1199401875)

This app provides a mobile student and faculty ID for Pohang University of Science and Technology. It also functions as an access pass for external visitors to enter the library.

**Highlights:** Mobile student ID, Mobile faculty ID, Library access pass, Replaces physical cards

**In-app purchases:** none


### PDF Grader PRO

[App page](https://appshunter.io/ios/app/pdf-grader-pro/id6755943630)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is POSTECH ID free?

POSTECH ID is free to download, with no in-app purchases.

### Is PDF Grader PRO free?

PDF Grader PRO costs $4.99, with no in-app purchases.

### Do POSTECH ID or PDF Grader PRO have ads?

PDF Grader PRO shows ads; POSTECH ID does not.

### Which is updated more often, POSTECH ID or PDF Grader PRO?

POSTECH ID ships an update every 5 months, and PDF Grader PRO every 3 days. Most recently, POSTECH ID was updated on October 11, 2026 and PDF Grader PRO on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*